Beall-Goldstein Tibetan man plowing
Even though there is less oxygen at high altitudes, Tibetans are able to work hard and consume sufficient amounts.
Beall-Goldstein Tibetan mother and child
Tibetan women with genotypes for high oxygen saturation have more surviving children than women with genotypes for low oxygen saturation.
Ominous Clouds Gather
Dark clouds gather over a campsite on the Tibetan Plateau. The photographer wrote of this photo, "Everybody was watching the monsoonal arcus cloud rolling over the camp. Suddenly, the weather changed. Rubbish was flying around and three men were hanging at the kitchen tent to keep it in place. This fascinating view presented itself shortly before the place turned into chaos."
At the Top of the World
Where is this icy, rugged landscape? Take a guess and scroll down to see if you're right…
It's the roof of the world: Mount Everest and its surrounding peaks. A NASA astronaut snapped this picture from the International Space Station in January 2011, revealing the scale of the glaciers surrounding the world's highest peak. The tip-top of Everest is out of sight in this picture, located just off the bottom edge, but the northern summit approach to the mountain starts along the East Rongbuk Glacier in the top right of the photograph. The knife-edge pass in the center of the photograph is the North Col, where climbers ascend toward progressively higher camps along the way to the peak. Everest's summit is 29,029 feet (8,848 meters) above sea level.
Naimona'nyi is the highest peak of the Nalakankar Himal in Tibet, but the ice is retreating on this stunning mountain.